Final answer:
The maximum amount the investor can spend to buy the land is $200,000.
Step-by-step explanation:
To determine the maximum amount the investor can spend to buy the land, we need to calculate the net operating income (NOI) and divide it by the investor's expected return rate. The NOI is the annual rent minus the expenses, which gives us $30,000 - $6,000 = $24,000. Next, we divide the NOI by the expected return rate expressed as a decimal: $24,000 / 0.12 = $200,000. Therefore, the maximum amount the investor can spend to buy the land is $200,000.